Julian R. deBullet, ASHRAE Life Member
deBullet Consulting, LLC
5993 Piney Grove Way
Gainesville, VA 20155
United States
(703) 483-0179
Region: III
Honorarium: $500 (International)
Julian R. de Bullet, President of deBullet Consulting LLC, has over 40 years’ experience in the HVAC industry specializing in educational outreach and energy advocacy. Retired, he is a Technical Consultant providing seminars for the Carrier Corporation team while developing strategies for high performance buildings that are safer, smarter and sustainable.

His career with UTC, Carrier Corporation from 1975 until 2000 concentrated on the applications of Chilled Water and All-Air systems as a General Manager of applied equipment sales and of a service/performance contracting operation. He spent 10 years as the Director of Industry Relations for a major HVAC OEM and then VP Business Development for a Thermal Ice Storage manufacturer. He has attended the Montreal Protocol meetings since 2003 and is a refrigerants expert for Carrier Corporation and government.

As ASHRAE Vice President (2001/2003), he served on the Society Board of Directors, the Executive Committee and was Chair of Member Council and Publishing Council. He is Past President of the ASHRAE National Capital Chapter and was Director and Regional Chair for ASHRAE Region III.

He is an ASHRAE Distinguished Lecturer with more than 400 technical seminars delivered around the world. Topics include Responsible Use of Refrigerants and Sustainable HVAC System applications.

He is an ASHRAE Life Member and holds the ASHRAE Distinguished and Exceptional Service Awards.

Presently he is a Member of Technical Committee TC8.2-Centrifugal Chillers and TC2.5- Climate Change

He is a Graduate of the London University system in England, where he obtained an Electrical Engineering degree and a Diploma in Marketing
Green “Sustainable” HVAC Design

This presentation will explore the different choices that must be made to ensure an efficient design. We will compare different systems, including LEED and Green Globes to see how the design can comply with Green design concepts. An exploration of Life cycle calculations will complete the seminar.

Responsible Use of Refrigerants

This presentation discusses the practical application of Standards 15, 147 and 34.including how to retrofit existing Mechanical Rooms to meet the Standard.  Emphasis is placed on the safety of the persons and property on or near the premises.

The presentation also discusses the practices and procedures that will reduce emissions into the atmosphere of halogenated refrigerants used in refrigeration and air-conditioning. 

Ever wonder why you hear so many different dates on the phase out of refrigerants?  Want to know which refrigerant is being phased out when and what will replace it?  This lecture will describe the current status of refrigerants and provide our best guess on where things are going in the future.

Optimal Air- a Cool Solution

One of the great standards of HVAC design is providing 55°F air off the cooling coil.  By default, it should provide reasonable dehumidification control.  Certainly, warmer air is risky, but what about colder air?  Does it save money?  What does it do to the HVAC design?  This course will cover the capital and annual operating costs as well as the design changes for Optimal Air Design.

Centrifugal Chiller Fundamentals

How does a centrifugal chiller work?  What is a stall or a surge?  What about single vs. multi stage compressor design?  How does a VFD chiller work? This course is developed for the consulting engineer to provide and understanding of how the chiller operates and how chiller operation and HVAC system design must be aligned for trouble free performance.

Chiller Plant Design Fundamentals

This is a primer course for the advanced chiller plant design courses.  It covers the basics of the components such as pumps, piping, cooling towers etc. that are used to construct a chiller plant.

Constant Flow Chiller Plant Design

This course takes the design through the pros and cons of single chiller, parallel, series and series counterflow chiller plant design. It compares operating cost as well as performance.  It is a good lead in to variable flow chiller plant design.

Variable Flow Chiller Plant Design

We will focus on primary/secondary and variable primary flow chiller plant design as influenced by ASHRAE Standard 90.1.  The material will cover pros and cons, design parameters and control issues.  Next we will discuss low delta T syndrome.  We will explain what it is and why it happens.  Then we will discuss how to correct it.

Condenser Water Heat Recovery

ASHRAE Standard 90.1 now requires us to consider condenser water heat recovery for large projects.  We will discuss the details of designing condenser water heat recovery including load sizing, and controls.  We will look at several different method of recovering the heat and analyze their pros and cons. Examples of successful applications and life cycle analysis will be offered.